Validation for serialized model objects

This gem helps to create wizard like interfaces in terminal applications, has support for nesting and value validation

A Ruby library for talking to the HMRC Government Gateway. This provides a builder for creating classes that can generate the XML needed complete with type information and runtime validation.

This plugin adds extra validations to a host.

Rack parameter validation and type coercion.

This ruby gem converts time of day to seconds (since midnight) and back. The value in seconds can be used for calculations and validations.

MiniTest matchers for ActiveModel::Validations

A managing interface layer for handling the creation and validation of JWTs

Interface and protocol for validating and validation discovery

Full-featured type system for any ruby project. Supports custom type definition, type validation, type casting and type categorizing. Provides a set of commonly used type categories and general purpose types. Has a flexible and simplest type definition toolchain.

Rails API parameter validation

When IBAN validation is not enough

Combine email validation and transformations to produce canonical email addresses.

This gem allows you to create use cases with ActiveModel validations and keep your model clean

DataValidator has almost active_recorde validation methods.

Validate your ActiveRecord models on the client, showing their error and success messages by providing a validation controller.

Explicit parameters validation and casting for Rails APIs

A wrapper for backbone.validation in the Rails asset pipeline

FlowChat is a Rails framework for building sophisticated conversational interfaces across USSD and WhatsApp platforms. Create interactive flows with menus, prompts, validation, media support, and session management. Features include multi-tenancy, background job processing, built-in simulator f...

Interpol is a toolkit for working with API endpoint definition files, giving you a stub app, a schema validation middleware, and browsable documentation.